Compress WebP Online
Processing entirely on your device — large files may take a moment.
Large WebP files slow down websites, eat mail attachment limits and fill up storage. This compressor reduces WebP size by re-encoding with a quality level you control — photos typically shrink by 30–80% at a visual difference most people never notice.
Compression runs entirely on your device with WebAssembly — your files are never uploaded, and there are no watermarks, queues or daily limits. The quality slider trades fidelity for file size: drag it lower for the smallest result, higher to preserve detail, and batch-drop as many files as you like.
How to compress WebP
- 1
Select your files
Drag & drop your WebP files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Compress" and pick a quality level — lower quality means a smaller file. Everything runs inside your browser; nothing is uploaded.
- 3
Download results
Download each converted WebP file individually, or grab everything at once as a ZIP archive.
About the WebP format
WebP is Google's image format, released in 2010 and built on the VP8 video codec. In lossy mode it typically produces files 25–35% smaller than JPG at the same visual quality, and it also has a true lossless mode that beats PNG. Crucially, one format covers what used to require two: lossy photos with transparency, and even animation, all in a single container.
Browser support is no longer the barrier it once was: Safari added WebP in iOS 14 (2020), and every modern browser now decodes it. The remaining friction is with older desktop software and a hard dimension limit of 16383×16383 pixels, which rules out very large panoramas and print masters.
+ Strengths
- ✓25–35% smaller than JPG at equal visual quality
- ✓Transparency and animation built into the same format
- ✓Supported by every current browser and most CDNs
- ✓Has a genuine lossless mode that out-compresses PNG
! Limitations
- −Hard limit of 16383×16383 pixels per image
- −Older photo apps and OS image viewers may not open it
- −Encoding is more CPU-intensive than JPG
Frequently asked questions
Is this compressor really free?
Yes — completely free with no sign-up, no watermark and no daily limits. The site is supported by advertising.
Are my files uploaded to a server?
No. Compression runs entirely inside your browser using WebAssembly, so your files never leave your device.
Can I compress multiple files at once?
Yes — drag in as many files as you like and they are compressed in one batch. When more than one file comes out, you can download everything as a ZIP.